US11059004B2 - Device and method for mixing, in particular dispersing - Google Patents

Device and method for mixing, in particular dispersing Download PDF

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Publication number
US11059004B2
US11059004B2 US15/567,125 US201615567125A US11059004B2 US 11059004 B2 US11059004 B2 US 11059004B2 US 201615567125 A US201615567125 A US 201615567125A US 11059004 B2 US11059004 B2 US 11059004B2
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gap
forming element
gap forming
openings
process region
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US20180099254A1 (en
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Eduard NATER
Achim Philipp Sturm
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Buehler AG
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Buehler AG
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Assigned to BUEHLER AG reassignment BUEHLER AG CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE'S NAME FROM BEUHLER AG TO BUEHLER AG PREVIOUSLY RECORDED ON REEL 044073 FRAME 0579. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: NATER, EDUARD, STURM, ACHIM PHILIPP
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    • B01F7/00608—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • B02C17/161—Arrangements for separating milling media and ground material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/17—Stirrers with additional elements mounted on the stirrer, for purposes other than mixing
    • B01F27/171—Stirrers with additional elements mounted on the stirrer, for purposes other than mixing for disintegrating, e.g. for milling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
    • B01F27/2123—Shafts with both stirring means and feeding or discharging means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • B01F27/2712—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator provided with ribs, ridges or grooves on one surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • B01F27/2713—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator the surfaces having a conical shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/40—Mixers with rotor-rotor system, e.g. with intermeshing teeth
    • B01F27/41—Mixers with rotor-rotor system, e.g. with intermeshing teeth with the mutually rotating surfaces facing each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/40—Mixers with rotor-rotor system, e.g. with intermeshing teeth
    • B01F27/41—Mixers with rotor-rotor system, e.g. with intermeshing teeth with the mutually rotating surfaces facing each other
    • B01F27/412—Mixers with rotor-rotor system, e.g. with intermeshing teeth with the mutually rotating surfaces facing each other provided with ribs, ridges or grooves on one surface
    • B01F7/00708—
    • B01F7/0075—
    • B01F7/00758—
    • B01F7/00775—
    • B01F7/00783—
    • B01F7/00858—
    • B01F7/00875—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/20—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors
    • B02C13/205—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors arranged concentrically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • B02C17/166—Mills in which a fixed container houses stirring means tumbling the charge of the annular gap type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details

Definitions

  • the present invention relates to a device and to a method for mixing, in particular dispersing, in accordance with the preamble of the independent claims.
  • mixing in the present case is understood as meaning combining materials or material flows in such a manner that as uniform a composition as possible is achieved; within the scope of the invention, the mixing serves in particular for producing dispersions, that is to say for dispersing.
  • dispersion is understood here as meaning a heterogeneous mixture produced from at least two materials which do not dissolve or scarcely dissolve into one another or bond chemically with one another.
  • a material disperse phase
  • another material dispersing agent or continuous phase
  • grinding aids ball-shaped grinding aids are frequently used, for example, in agitator mills.
  • the present invention relates above all to (the production of) suspensions, that is to say dispersions where a liquid forms the continuous phase and a solid forms the disperse phase.
  • dispersing is also understood as meaning the wetting of the material to be dispersed (and optionally the subsequent stabilization).
  • Crushing can typically be the dissolving of agglomerates into primary particles. Aggregates or associates (if condensing is brought about by van-der-Waals forces or stronger chemical types of formation) can also be crushed into primary particles, however, during the dispersing.
  • dissolving of agglomerates can also occur in devices without grinding aids, as in a disperser or dissolver, devices with grinding aids, such as, for example, an agitator mill with ball-shaped grinding aids, are required to crush aggregates or crystals.
  • grinding aids such as, for example, an agitator mill with ball-shaped grinding aids
  • Aggregates in the broader sense can also be understood here as meaning larger crystalline or amorphous structures. Where aggregates, crystalline or amorphous structures are crushed, true crushing is referred to.
  • Device of the type in question for mixing two materials in particular a liquid and a solid, such as, for example, a powder, normally have a housing and a rotor which rotates therein.
  • the materials are introduced into the housing by means of at least one feed line.
  • the materials are mixed by means of the rotor and are then conducted out of the housing.
  • the device for dispersing comprises a chamber for dispersing, at least one agitating disk, an inlet through which the liquid with the material to be treated and the dispersion medium are sucked in as a result of rotation of the agitating disk, an outlet and a separating device.
  • the separating device is arranged at the outlet.
  • the grinding aids are separated from the dispersion by means of the separating device.
  • the separating device can leave the dispersion through the outlet, with the grinding aids being retained, as described.
  • DE 10 2010 053 484 discloses an agitator bead mill with a separating device for grinding aids, wherein the separating device is arranged about an axis of rotation.
  • the separating device consists of two components, wherein one component is at least one separating device and a second component is a dynamic element for generating a material flow.
  • the device comprises a very small dynamic gap as a separating device, and therefore the output is reduced.
  • DE 1 507 493 discloses an agitator bead mill with disk-shaped agitating tools in a cylindrical housing, wherein one or two disks are fitted above the rotor and, with stator elements, produce dynamic gaps.
  • the output is also greatly limited here by the small number of outlet gaps. Furthermore, the possibility of discharging the mixture from the device is possible only very locally.
  • DE 35 21 668 discloses an agitator mill in which the separating device for separating off the grinding bodies consists of a sieve. Such a sieve can easily become blocked and therefore increases the maintenance frequency of the device.
  • a device for mixing, in particular dispersing which comprises the following features:
  • the openings of the first gap-forming element and the openings of the second gap-forming element are arranged in such a manner that a mixture produced from the supplied materials is conductible from the first process region into the second process region through the openings in the two gap-forming elements.
  • a device of this type results in a high throughput without there being any risk of a blockage.
  • the gap-forming elements have to be rotatable relative to each other, and therefore both elements can also be designed in a rotatable manner. In this case, the rotational speeds and/or the direction of rotation have to differ.
  • the openings in the gap-forming elements are preferably arranged in such a manner that the openings do not overlap and material can only pass from the openings of the first gap-forming element to the openings of the second gap-forming element through a gap between the openings. Once the gap has been passed, the openings are intended to enable a large material flow and therefore have an opening diameter/opening cross section which is large compared to the gap.
  • the gap according to the invention is formed between the two gap-forming elements.
  • the smallest extent of the openings in the first gap-forming element is preferably at least three times as large as the largest extent of the gap between the two gap-forming elements.
  • the smallest extent of the openings in the second gap-forming element is preferably also at least three times as large as the largest extent of the gap between the two gap-forming elements.
  • the second gap-forming element comprises annular gaps
  • the extents of the annular gaps obviously have to substantially correspond to the extent of the gap between the gap-forming elements or have to be smaller than the gap between the gap-forming elements.
  • a high throughput is achieved by means of a high number of annular gaps.
  • the gap according to the invention between the first gap-forming element and the second gap-forming element has a separating function. The extent of the gap prevents particles which are larger than the gap from passing into the second process region.
  • At least one, preferably two, preferably dynamic, gaps can be formed between the housing and the first gap-forming element.
  • the first gap-forming element can surround the second gap-forming element and a gap of a maximum of 3 mm, preferably 1.0 mm and particularly preferably 0.5 mm, can be formed between the two elements.
  • the minimum gap has a transverse extent of 0.1 mm.
  • a gap the maximum extent of which is smaller than the smallest element of the grinding bodies which are pourable or poured into the device, is formed between the two gap-forming elements.
  • the gap is preferably a maximum of half the size of the diameter of the smallest grinding body.
  • Grinding tools which are designed for mixing or dispersing the materials introduced in the first process region can be arranged on the first gap-forming element and/or on the housing.
  • Grinding tools of this type can be pins or disks or other known embodiments of grinding tools.
  • the effectiveness of the dispersing is increased by means of grinding tools.
  • the first gap-forming element is preferably designed as a rotor, and therefore the movement of the supplied materials and possibly of the grinding bodies is generated by means of the grinding tools on the rotor and dispersion is thus achieved in the first process region.
  • the first gap-forming element can extend substantially completely along a length of the first process region.
  • Grinding bodies the forwarding of which into the second process region is preventable by means of gaps, in particular dynamic gaps, can be pourable into the first process region.
  • the dynamic gaps can be formed between the first gap-forming element and the second gap-forming element and additionally between the first gap-forming element and the housing. Therefore, only material which has been completely dispersed passes into the second process region, and the movement at the gap edges means that the gaps cannot be blocked.
  • no static separating device is formed between the first and the second process region.
  • a static separating device is a separating device where the edges of the openings through which the mixture passes do not move. Static separating devices are therefore in particular fixedly mounted sieves.
  • the second gap-forming element can be designed as a static separating device, wherein the openings in the static separating device are preferably smaller than the minimum diameter of the grinding bodies.
  • the openings in the static separating device are formed by annular gaps.
  • a static separating device of this type reliably holds back grinding bodies and oversized particles from the second process region.
  • Both gap-forming elements can be formed in a cylindrical or conical manner.
  • the gap-forming elements as circular disks which are arranged between the first and the second process region.
  • the gap between the first gap-forming element and the second gap-forming element can have a longitudinal extent which is formed parallel to the axis of rotation. Where there are circular-disk-shaped gap-forming elements, the gap can be formed substantially perpendicular to the axis of rotation. Where the gap-forming elements are conical, the gap can be at an angle of between 1° and 89° with respect to the axis of rotation.
  • the openings of the gap-forming elements can extend along a length of at least 50%, preferably 60%, particularly preferably 70%, of the length of the first gap-forming element in the first process region.
  • two or more bores can be connected to one another at the periphery of the second gap-forming element by a groove, preferably a milled groove.
  • the groove obviously must not overlap with the openings in the first gap-forming element. A large outflow volume can therefore be created and the mixture is rapidly discharged into the second process region.
  • the housing of the device can furthermore comprise a pump housing or can be connected to a pump housing which forms a pump on the housing of the device.
  • the pump housing and the housing of the device can be formed in one piece or in multiple pieces. In the case of a multiple-piece design, the pump housing is preferably flange-mounted on the housing of the device.
  • a pump is arranged in the pump housing.
  • the required pump is therefore directly connected to the device for mixing, and only a control means and a few external lines are necessary.
  • the same shaft as for driving the moving gap-forming element and/or the grinding tools can be used to drive the pump.
  • the pump housing comprises a pump inlet and a pump outlet.
  • the pump can be a centrifugal pump, a liquid ring pump, a side-channel pump or a positive-displacement pump, such as, for example, an impeller pump.
  • the object is furthermore achieved by a method for dispersing materials in a device, preferably as described above.
  • the method comprises the steps:
  • the mixture can furthermore be additionally conducted through one or more dynamic gaps between the first gap-forming element and a housing of the device.
  • the dispersing in the first process region can be achieved by grinding bodies and/or grinding tools.
  • Grinding tools can be disks or pins or similar grinding tools which are already known from the prior art.
  • Grinding bodies are hard, round or elliptical bodies which contribute to the dispersing of the material.
  • the grinding bodies are adapted to the desired degree of dispersion and can also have a different size depending on the material which is introduced.
  • the grinding bodies are held back by the gap/the gaps between the gap-forming elements and/or the housing.
  • the dispersing can be achieved by grinding bodies which have a diameter which is at least 1.5 times, preferably 3 times, in particular 10 times, larger than the largest gap as the transverse extent.
  • the grinding bodies cannot pass through the gap and the gap serves as a dynamic separating device.
  • the mixture can be conducted through at least 4, preferably 20, particularly preferably 100, openings in the first gap-forming element.
  • the mixture can furthermore be conducted through at least 4, preferably at least 50, particularly preferably a minimum of 200, openings in the second gap-forming element.
  • an optimized throughput of mixture can be achieved by means of the number of openings.
  • the openings in the second gap-forming element can be formed at least in part by bores.
  • two or more bores can be connected to each other on the periphery by a groove, preferably a milled groove.
  • the groove obviously must not overlap with the openings in the first gap-forming element. A large outflow volume can therefore be created and the mixture is rapidly discharged into the second process region.
  • FIG. 1 shows a section through a first and a second gap-forming element
  • FIG. 2 shows a view of a first embodiment according to FIG. 1 ,
  • FIG. 3 shows a view of a section through a first embodiment according to FIG. 1 ,
  • FIG. 4 shows a view of a second embodiment of a first and second gap-forming element
  • FIG. 5 shows a section through a second embodiment according to FIG. 4 ,
  • FIG. 6 shows an oblique view of a second embodiment according to FIG. 4 ,
  • FIG. 7 shows a view of a section of a second embodiment according to FIG. 4 .
  • FIG. 8 shows a section through a third embodiment of a first and second gap-forming element
  • FIG. 9 shows a view of a third embodiment according to FIG. 8 .
  • FIG. 10 shows a view of a section of a third embodiment according to FIG. 8 ,
  • FIG. 11 shows a section through a fourth embodiment of a first and second gap-forming element
  • FIG. 12 shows a view of a fourth embodiment according to FIG. 11 .
  • FIG. 13 shows a view of a section through a fourth embodiment according to FIG. 11 ,
  • FIG. 14 shows a section through an embodiment of the first and second gap-forming element with a conveying element
  • FIG. 15 shows a view of a device from FIG. 14 .
  • FIG. 16 shows a view of a section through a device from FIG. 14 ,
  • FIG. 17 shows a section through a first embodiment of a first and second gap-forming element
  • FIG. 18 shows a detail from FIG. 17 ,
  • FIG. 19 shows a section through a fifth embodiment of a first and second gap-forming element
  • FIG. 20 shows a view from the device from FIG. 19 ,
  • FIG. 21 shows a view of a section from the device from FIG. 19 ,
  • FIG. 22 shows a section from a sixth embodiment of a first and second gap-forming element
  • FIG. 23 shows a view of a device from FIG. 22 .
  • FIG. 24 shows a view of a section of a device from FIG. 22 .
  • FIG. 25 shows a section through a device according to the invention
  • FIG. 26 shows a view of a section from FIG. 25 ,
  • FIG. 27 shows a second embodiment of a device according to the invention
  • FIG. 28 shows a view of a section from a device from FIG. 27 ,
  • FIG. 29 shows a section through a third embodiment of the device according to the invention.
  • FIG. 30 shows a view of a section of the device from FIG. 29 ,
  • FIG. 31 shows a section through a third embodiment of the device according to the invention.
  • FIGS. 1 to 13 each show various views of various embodiments of the gap-forming elements 7 , 9 . Each of these embodiments can be installed in a housing 2 of a device 1 .
  • FIGS. 1 to 3 show a first embodiment of the gap-forming elements 7 , 9 .
  • FIG. 1 shows in this connection a section, FIG. 2 a view and FIG. 3 a view of a section.
  • the first gap-forming element 7 is formed in a cylindrical manner and surrounds the second gap-forming element 9 .
  • the second gap-forming element 9 is also formed in a cylindrical manner.
  • the first gap-forming element 7 comprises openings 8 which are formed in a rectangular manner, wherein the corners of the openings 8 have been rounded.
  • the second gap-forming element 9 comprises openings 10 which are formed in a round manner. The openings 8 and the openings 10 do not overlap. Gaps 13 are formed between the openings 8 and the openings 10 .
  • At least one of the two gap-forming elements 7 , 9 is formed rotatably about the axis of rotation 11 . Dynamic gaps 13 therefore arise.
  • the first gap-forming element 7 is directed toward the first process region 4
  • the second gap-forming element 9 is directed toward the second process region 5 .
  • the second gap-forming element 9 furthermore comprises a connecting groove 29 which connects the openings 10 along the periphery of the second gap-forming element. Improved transporting away of the mixture after passage through the gap is therefore made possible.
  • the connecting groove 29 also does not overlap with the openings 8 of the first gap-forming element 7 .
  • the openings 8 have an extent of 15 ⁇ 30 mm
  • the openings 10 have a diameter of 12 mm in the region of the bore.
  • the openings 10 are connected in the circumferential direction by a groove which has an extent of 13 mm.
  • the necessary extent of the openings 8 , 10 is at least three times the largest diameter of the grinding bodies used, if grinding bodies are used.
  • FIGS. 4 to 7 show a second embodiment of the gap-forming elements 7 , 9 .
  • FIG. 4 shows in this connection a view, FIG. 5 a section, FIG. 6 an oblique view and FIG. 7 a view of a section.
  • the two gap-forming elements 7 and 9 are formed in the shape of circular disks.
  • the first gap-forming element 7 comprises openings 8 which are formed in a round manner.
  • the second gap-forming element 9 comprises openings 10 which are likewise formed in a round manner.
  • the openings 8 do not overlap with the openings 10 . Consequently, a gap 13 is produced through which the mixture can pass from the first process region 4 (not illustrated) into the second process region 5 (not illustrated).
  • FIGS. 8 to 10 show a third embodiment of the gap-forming elements 7 , 9 .
  • FIG. 8 shows in this connection a section 9 , FIG. 9 a view and FIG. 10 a view of a section.
  • the first gap-forming element 7 is directed toward the first process region 4 (not illustrated) and the second gap-forming element 9 is directed toward the second process region 5 .
  • the first gap-forming element 7 comprises openings 8 which are formed in a round manner.
  • the first gap-forming element 7 completely surrounds the second gap-forming element 9 , wherein both gap-forming elements 7 and 9 are formed in a rotationally symmetrical and conical manner.
  • the second gap-forming element 9 comprises openings 10 which are likewise formed in a round manner. At least one of the gap-forming elements 7 , 9 is formed rotatably about the axis of rotation 11 .
  • the openings 8 and the openings 10 do not overlap, but rather form gaps 13 (added by way of example) through which the mixture can flow from the first process region 4 (not illustrated) into the second process region 5 .
  • FIGS. 11 to 13 show a further embodiment of the gap-forming elements 7 , 9 .
  • FIG. 11 shows in this connection a section, FIG. 12 a view and FIG. 13 a section through the plane B-B of FIG. 11 .
  • the embodiment from FIGS. 11 to 13 substantially corresponds to the embodiment of FIGS. 1 to 3 apart from the shape and the number of the openings 8 .
  • the openings 8 in the first gap-forming element 7 are shaped asymmetrically and, in a departure from the openings 8 from the embodiment of FIGS. 1 to 3 , comprise a ramp 19 .
  • the ramp 19 serves as a flow-optimized embodiment for rejecting grinding bodies when the first gap-forming element 7 is designed as a rotor.
  • the number of openings 8 is in each case eight openings 8 in the circumferential direction and four in the longitudinal direction, therefore a total of 32 openings 8 in the first gap-forming element 7 . Consequently, the mixture can pass more easily into the openings 8 and a higher flow rate into the second process region 5 is achieved.
  • the first gap-forming element 7 is designed here rotatably about the axis of rotation 11 .
  • the ramp 19 here has an inclination (alpha) to the tangent to the inside diameter of the first gap-forming element ( 7 ) of 10° to 80°, preferably 30°.
  • FIGS. 14 to 16 show the embodiment of the gap-forming elements 7 , 9 from FIGS. 1 to 3 with grinding tools 14 and a conveying element 18 .
  • FIG. 14 here shows a section, FIG. 15 a view and FIG. 16 a view of a section.
  • the first gap-forming element 7 comprises openings 8 and grinding tools 14 .
  • the first gap-forming element 7 is designed as a rotor, and therefore the grinding tools 14 can contribute to dispersing the materials in the first process region 4 (not illustrated).
  • the gap-forming element 9 surrounds the second process region 5 .
  • the second gap-forming element 9 comprises openings 10 .
  • a conveying element 18 is arranged in the second process region 5 and is designed to be rotatable about the axis of rotation 11 , precisely in the manner of the first gap-forming element 7 , 3 .
  • the conveying element conveys the mixture out of the second process region 5 and therefore ensures a good throughput through the device.
  • FIG. 17 shows the embodiment from FIGS. 1 to 3 with the gap-forming elements 7 , 9 and the openings 8 , 10 . At least one of the gap-forming elements 7 , 9 is formed rotatably about the axis of rotation 11 .
  • FIG. 18 shows a detail A from FIG. 17 .
  • the first gap-forming element 7 with the second gap-forming element 9 and the gap portion 24 formed between the gap-forming elements 7 and 9 is illustrated.
  • the gap portion 24 has a longitudinal extent b and a transverse extent a.
  • the transverse extent a of the gap portion 24 is smaller than the smallest grinding body which is pourable into the first process region 4 (not illustrated).
  • the second gap-forming element 9 can be configured to be interchangeable, and therefore the gap 24 is designed to be adaptable to the grinding bodies 16 (not illustrated) if the grinding bodies 16 also have a different size in a first process than in a further process.
  • the transverse extent a of the gap portion 24 corresponds to the transverse extent of the gap 13 (see FIG. 17 ).
  • FIGS. 19 to 21 show a further embodiment of the gap-forming elements 7 , 9 .
  • FIG. 19 shows in this connection a section, FIG. 20 a view and FIG. 21 a view of a section.
  • the gap-forming element 7 is formed analogously to the gap-forming element 7 from FIGS. 1 to 3 .
  • the second gap-forming element 9 is designed in such a manner that it comprises a multiplicity of annular gaps 20 .
  • the annular gaps 20 are dimensioned in such a manner that only sufficiently dispersed material can enter the second process region 5 .
  • grinding bodies 16 (not illustrated) which are possibly present cannot pass out of the first process region 4 (not illustrated) through the annular gaps 20 .
  • At least one of the gap-forming elements 7 , 9 is formed rotatably about the axis of rotation 11 .
  • the annular gaps 20 are stabilized by stabilizing webs 25 .
  • FIGS. 22 to 24 show a further embodiment of the second gap-forming element 9 .
  • the first gap-forming element 7 corresponds to the first gap-forming element from FIGS. 1 to 3 .
  • FIG. 22 shows in this connection a section, FIG. 23 a view and FIG. 24 a view of a section.
  • the first gap-forming element 7 comprises openings 8 which are formed analogously to FIGS. 1 to 3 .
  • the second gap-forming element 9 comprises openings 10 and in addition annular gaps 20 .
  • the annular gaps 20 are arranged in such a manner that they overlap with the openings 8 in the first gap-forming element 7 . Only already dispersed mixture can pass through the annular gaps 20 and larger particles are held back. Consequently, this embodiment permits a greater penetration since a greater penetration volume is made possible by means of the annular gaps.
  • FIGS. 25 and 26 show the arrangement of a first and second gap-forming element 7 , 9 according to FIGS. 14 to 16 in a device 1 .
  • FIG. 25 shows in this connection a section and FIG. 26 a view of a section.
  • the device 1 comprises a housing 2 which includes a first gap-forming element 7 and a second gap-forming element 9 .
  • An inlet 3 into the housing 2 is formed.
  • the materials to be mixed are introduced into the first process region 4 through the inlet 3 .
  • the first process region 4 furthermore comprises grinding bodies 16 .
  • the housing 2 is equipped with grinding tools 14 on the housing wall. Corresponding grinding tools 14 are formed on the first gap-forming element 7 .
  • the dispersed mixture passes from the first process region 4 into the second process region 5 by means of gaps 12 , 13 .
  • a conveying element 18 which rotates about the axis of rotation 11 is formed in the second process region 5 .
  • the first gap-forming element 7 also rotates about the axis of rotation 11 .
  • the gaps 12 , 13 are smaller than the diameter of the grinding bodies 16 . Consequently, grinding bodies 16 cannot enter the second process region 5 .
  • the length of the first process region 15 substantially corresponds to the length of the first gap-forming element 7 .
  • the embodiment of the device 1 in FIGS. 27 and 28 substantially corresponds to the embodiment of FIGS. 25 and 26 .
  • the device 1 additionally comprises a pump housing 21 of a water ring pump 30 .
  • the pump housing 21 is flange-mounted on the housing 2 and comprises a pump inlet 23 and a pump outlet 22 .
  • a pre-mix is pumped from the pump outlet 22 to the inlet 3 of the device.
  • FIG. 27 shows in this connection a section and FIG. 28 a view of a section.
  • the device 1 has an inlet 3 and an outlet 6 in the housing 2 in this embodiment.
  • no grinding aids are present in this embodiment.
  • the first process region substantially extends along the first gap-forming element 7 . A high throughput can therefore be achieved.
  • the advantage of the simultaneous design of a pump resides in particular in the simplified control means.
  • FIGS. 29 and 30 show a further embodiment of the device 1 .
  • FIG. 29 shows in this connection a section and FIG. 30 a view of a section.
  • a side-channel pump 31 is arranged in the pump housing 21 in this embodiment.
  • the pump housing likewise comprises a pump inlet 23 and a pump outlet 22 .
  • the pre-mix is pumped from the pump outlet 22 into the inlet 3 of the device.
  • the design of the device substantially corresponds to the embodiment in FIGS. 25 and 26 .
  • FIG. 31 shows an alternative embodiment of the device 1 in which the gap-forming elements 7 , 9 extend only over a partial region of the first process region 4 .
  • grinding tools 14 in the form of perforated disks are formed in the first process region 4 .
  • the first gap-forming element 7 rotates about the second gap-forming element 9 .
  • the two gap-forming elements 7 , 9 have respective openings 8 , 10 .
  • the mixture flows from the first process region 4 through the gaps 13 into the second process region 5 .
  • the housing 2 furthermore has an inlet 3 and outlets 6 .
  • the grinding tools 14 are arranged on a shaft 26 .
  • the shaft 26 comprises a shaft groove 27 in which engagement cams 28 of the first gap-forming element 7 engage. Consequently, the first gap-forming element is driven by the same shaft as the grinding tools 14 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Crushing And Grinding (AREA)
  • Accessories For Mixers (AREA)
US15/567,125 2015-04-17 2016-03-22 Device and method for mixing, in particular dispersing Active 2037-07-16 US11059004B2 (en)

Applications Claiming Priority (4)

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EP15164059 2015-04-17
EP15164059 2015-04-17
EP15164059.6 2015-04-17
PCT/EP2016/056216 WO2016165917A1 (de) 2015-04-17 2016-03-22 Vorrichtung und verfahren zum mischen, insbesondere zum dispergieren

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US11059004B2 true US11059004B2 (en) 2021-07-13

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JP (1) JP6785791B2 (ja)
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DE102018123096B4 (de) * 2018-09-20 2022-01-27 Netzsch Feinmahltechnik Gmbh Rührwerkskugelmühle und Verfahren zum Betreiben einer Rührwerkskugelmühle
CN109453709A (zh) * 2018-12-26 2019-03-12 江苏康鹏农化有限公司 一种新型的自动化农药混合搅拌装置
CN109847615B (zh) * 2019-03-29 2021-05-18 重庆今天饲料有限公司 一种饲料粉碎搅拌装置
CN111250225B (zh) * 2019-07-26 2023-12-01 湖北迈兆机械有限公司 离心式研磨系统
CN111085138A (zh) * 2020-01-16 2020-05-01 上海数郜机电有限公司 一种真空高速混料罐
CN112999920B (zh) * 2021-03-09 2022-08-26 广东省农业科学院蚕业与农产品加工研究所 一种液体食品搅拌装置

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JP2018513009A (ja) 2018-05-24
RU2699108C2 (ru) 2019-09-03
ES2849179T3 (es) 2021-08-16
EP3283204A1 (de) 2018-02-21
JP6785791B2 (ja) 2020-11-18
BR112017022241A2 (pt) 2018-07-10
WO2016165917A1 (de) 2016-10-20
US20180099254A1 (en) 2018-04-12
RU2017139802A3 (ja) 2019-05-17
MX2017013319A (es) 2018-08-15
CN107690354A (zh) 2018-02-13
BR112017022241B1 (pt) 2022-04-12
CN107690354B (zh) 2021-06-29
RU2017139802A (ru) 2019-05-17
EP3283204B1 (de) 2020-12-23

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